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Updated: Oct 24, 2026

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Bioassays for Monitoring Insecticide Resistance
Published on: December 30, 2010
Susceptibility of Brazilian samples of Boophilus microplus to organophosphorus acaricides
Tropical Animal Health and Production
|February 1, 1980
Abstract:
This paper describes the susceptibility of various samples of Boophilus microplus from the southern region of Minas Gerais State in Brazil to the 4 commonest organophosphorus acaricides employed in the area. All samples showed some degree of resistance to each of the compounds used. The resistance factor varied from 1.42 to 132.90, being less in the case of dicrotophos fenthion than with chlorpyrifos and coumaphos.

